Specification of Samuel Hall : boilers, furnaces and flues.

  • Hall, Samuel.
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Samuel Hall : boilers, furnaces and flues. Source: Wellcome Collection.

    10/22 (page 8)
    Hall's Improvements in Boilers, Furnaces, Flues\ Qc. disconnect the vessel B and cistern G, and the latter to do the same with vessel B and the atmosphere. The operation of this apparatus is the same as that already described with double-way cocks. To perform which wheels similar to those shewn by H and I, Sheet 2, as put on the cocks, must be put on the shafts on which the 5 excentrics M, M, are fixed, and an intermediate wheel like that shewn by J, Sheet 2, with the proper number of teeth in the situations required, must work in them, by which means the two pairs of valves C, C, and D, D, will be * opened and shut respectively, in the same way as is performed by the two.; double-way cocks'; any other mode, however, may be adopted to open and shut 10 each pair of valves alternately. ^Figure 1, Sheet 4, is an apparatus for supplying water to boilers when it is too low in them, when no water is being supplied to them, as at meal times, &c. A, A, is the top of the boiler; B, B, is the bottom of it; C, C, is the water line, or height at which the water ought to be in the boiler; D is a float, 15 of stone or other material, to regulate the height of the water in the manner hereafter described; E is a cistern supplied by water through pipe a and valve b by any convenient means ; F, G, are two pipes furnished with valves c and d, properly weighted to overcome the pressure of the steam in the boiler, to connect the cistern with the boiler, and to disconnect them, as hereafter 20 pointed out; F opens into the top of the cistern and into the top of the boiler, which are connected and disconnected as required by the valve c ; G, opens into the bottoms of such cisterns and boiler, and they are in the same way connected and disconnected by valve d; e is a valve which when shut, as herein-after mentioned, renders the water cistern E a close vessel; / is a rod 25 of iron on which float D is suspended, and which is counterbalanced by lever g, and the weight on its other end h, acting on the pin i, which (when the water in the boiler becomes too low) allows the collar on the rod/to descend through a hole in lever k, and deposit the spherical weight o upon it, and thereby dose the valve e. When that is done the float D on still further descending SO* opens valves c and d by the pin t in the rod / pressing upon levers m and n, both of which reach to that pin, thus supplying the boiler with water till it becomes of the proper height, when the rising of the float prevents any further supply by closing the valves c and d, and opening the valve e. The operation of this apparatus is as follows:—When the water in the 35 boiler becomes too low the float D descends, and by means of the rod f lowers the spherical weight j9 as above stated, upon the lever Jc, which shuts f the valve e, and by means of the pin t, acting upon the levers m and n, opens